Plane: StartUnstartedLogging replaces logging_started/start_logging

ArduPlane/Log.cpp

@@ -561,7 +561,7 @@ void Plane::Log_Write_Vehicle_Startup_Messages()
 // start a new log
 void Plane::start_logging() 
 {
-    DataFlash.StartNewLog();
+    DataFlash.StartUnstartedLogging();
 }
 
 /*

ArduPlane/system.cpp

@@ -847,9 +847,7 @@ bool Plane::should_log(uint32_t mask)
     if (in_log_download) {
         return false;
     }
-    if (!DataFlash.logging_started()) {
-        start_logging();
-    }
+    start_logging();
     return true;
 #else
     return false;